In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Input: Consider Input: Article: Wood Buffalo National Park  Wood Buffalo National Park is Canada's largest national park and one of the largest in the world. Established in 1922 to protect the last remaining herds of bison in northern Canada, it now protects an outstanding example of Canada's Northern Boreal Plains. The park was designated a World Heritage Site in 1983. Phone: (780) 697-3662 E-mail: wbnp.info@pc.gc.ca Banff National Park of Canada Banff's rich history dates back to 1885, when three railway workers stumbled upon hot mineral springs surfacing from deep within the mountains. This discovery led to the establishment of Banff National Park, and marked the beginning of Canada's national park system. Spanning 6,641 meadows and rivers, Banff National Park is one of the world's premier destination spots.  Phone: (403)762-1550 E-mail: banff.vrc@pc.gc.ca St. Lawrence Islands National Park of Canada   Conceived in the 1870s, St. Lawrence Islands is one of Canada's oldest national parks. Located in the scenic 1,000 Islands tourist area, this tiny jewel has a rich and complex natural human history. Centuries ago, aboriginal peoples referred to it as the "Garden of the Great Spirit". Today, 24 scenic islands, along with a mainland area at Mallory town Landing, are included in the park. Phone: (613) 923-5261  E-mail: ont. sli@pc.gc.ca Grasslands National Park of Canada  It was here Sitting Bull took refuge after the Battle of Little Big Horn in 1876. Grasslands National Park is the first national park of Canada to preserve a portion of the mixed prairie grasslands. This magical land of diversity, beauty and history is divided into two blocks. The East Block contains the Killdeer Badlands and the Wood Mountain Uplands, and the West Block preserves the Frenchman River Valley and the dissected plateaus, coulees and famous 70 Mile Butte.  Phone: (306) 298-2257 E-mail: grasslands. info@pc.gc.ca 
 Answer: Because hot mineral springs were found in Banff.

Output: Why was Banff National Park built?


Input: Consider Input: Article: THURSDAY, July 9 (Health Day News) -- A new study that found that a lower calorie diet slowed the aging process in monkeys could be the best proof yet that restricted diets might do the same for humans. "The big question in aging research is, 'Will caloric restriction in species closely related to humans slow aging?'" said Richard Weindruch, senior author of a paper appearing in the July 10 issue of Science. This is the first clear demonstration that, in a primate species, we' re inducing a slowdown of the aging process -- showing increased survival, resistance to disease, less brain atrophy and less muscle loss. "This predicts humans would respond similarly," added Weindruch, professor of medicine at the University of Wisconsin and an investigator at the Veterans Hospital in Madison. Another expert noted that, despite some highly publicized studies in certain species, the link between restricted eating and longer lifespan has been far from proven. "The idea that dietary restriction extends lifespan in all species is not true. Many strains of rats and mice do not respond. In some strains, it' s actually deleterious," explained Felipe Sierra, director of the biology of aging program at the US National Institute on Aging (NIA), which supported the new study. "The fact that it doesn't work in some mice but it does seem to work in monkeys is surprising and it gives us hope." But there's a larger question: how to change humans' increasingly careless eating habits. "This finding doesn't give me hope that humans are going to go into dietary restriction," added Marianne Grant, a registered dietitian at Texas A&M Health Science Center Coastal Bend Health Education Center in Corpus Christi. 
 Answer: This experiment indicates restricted diets could extend humans' lifespan.

Output: Which of the following statements about Weindruch is true?


Input: Consider Input: Article: The united States has about 475,000 school buses -- all painted yellow. Each day they carry more than 25,000,000 children, half of all schoolchildren in the country. But these buses, on average, use four liters of diesel   fuel to travel less than sixteen kilometers. When the school year began last fall, diesel averaged 55 cents a liter nationally. The price nearly doubled, to a dollar and 8 cents, by the end of school in June. Bob Riley speaks for the American School Bus Council. He says fuel prices for schools are not much lower than others have to pay. As a result, schools are looking for ways to reduce transportation costs. Bus routes are being redrawn or, in some cases, canceled. Some areas are buying buses that use natural gas or other alternative fuels. Other steps include fewer field trips and less travel by sports teams. And some school districts may end any bus service not required by law. Studies show that school buses are the safest form of transportation to and from school. The American School Bus Council says cuts in bus service are bad for children and possibly the environment. It says removing buses from the road will mean an increase in other vehicles transporting students. Spokesman Bob Riley says another concern is that reducing bus services might reduce attendance. But it could also get more children to walk or bicycle to school. And that would surely make people happy at the National Center for Safe Routes to School. More kids walking or biking safely to school is the aim of a three-year-old federal program, part of an international movement. The goal is to increase physical activity and reduce air pollution. The United States will celebrate Walk to School Day on October eighth this year. But for some students, high fuel prices could make every day a walk-to-school day. 
 Answer: High fuel prices' influences on school buses.


Output: What does this passage mainly tell us?


